/**
 * @Author: 健聪
 * @Description: 条件语句 if
 * @Date: 2024/01/11
 */
void main() {
  int score = 100;

  if (score > 90) {
    if(score == 100) {
      print("完美");
    }else{
      print("优秀");
    }
    // print("优秀");
  } else if (score > 60) {
    print("良好");
  } else if (score == 60) {
    print("及格");
  } else {
    print("不及格");
  }
}
